Harappa is an archeological site belonging to which civilization?

Harappa is an archeological site belonging to which civilization?

ہڑپہ ایک آثار قدیمہ کا مقام ہے جس کا تعلق کس تہذیب سے ہے؟
Explanation

Harappa was an Indus civilization urban centre.

It lies in Punjab Province, Pakistan, on an old bank/bed of the River Ravi. 

Harappa was the first site of the civilization to be excavated in 1921.

The excavation team was led by Daya Ram Sahni.